Spring对AOP的实现提供了很好的支持。下面我们就使用Spring的注解来完成AOP做一个例子。

首先，为了使用Spring的AOP注解功能，必须导入如下几个包。aspectjrt.jar,aspectjweaver.jar,cglib-nodep.jar.

然后我们写一个接口

package com.bird.service;public interface PersonServer {    public void save(String name);    public void update(String name, Integer id);    public String getPersonName(Integer id);    }

和一个接口实现类

package com.bird.service.impl;import com.bird.service.PersonServer;public class PersonServiceBean implements PersonServer{        @Override    public void save(String name) {                System.out.println("我是save方法");    //    throw new RuntimeException();    }    @Override    public void update(String name, Integer id) {                System.out.println("我是update()方法");    }    @Override    public String getPersonName(Integer id) {                System.out.println("我是getPersonName()方法");        return "xxx";    }}

下面使用Spring注解方式对这个Bean进行方法拦截

package com.bird.service;import org.aspectj.lang.ProceedingJoinPoint;import org.aspectj.lang.annotation.After;import org.aspectj.lang.annotation.AfterReturning;import org.aspectj.lang.annotation.AfterThrowing;import org.aspectj.lang.annotation.Around;import org.aspectj.lang.annotation.Aspect;import org.aspectj.lang.annotation.Before;import org.aspectj.lang.annotation.Pointcut;/** * 切面 * @author Bird * */@Aspectpublic class MyInterceptor {    @Pointcut("execution(* com.bird.service.impl.PersonServiceBean.*(..))")    private void anyMethod(){}//定义一个切入点        @Before("anyMethod() && args(name)")    public void doAccessCheck(String name){        System.out.println(name);        System.out.println("前置通知");    }        @AfterReturning("anyMethod()")    public void doAfter(){        System.out.println("后置通知");    }        @After("anyMethod()")    public void after(){        System.out.println("最终通知");    }        @AfterThrowing("anyMethod()")    public void doAfterThrow(){        System.out.println("例外通知");    }        @Around("anyMethod()")    public Object doBasicProfiling(ProceedingJoinPoint pjp) throws Throwable{        System.out.println("进入环绕通知");        Object object = pjp.proceed();//执行该方法        System.out.println("退出方法");        return object;    }}@Pointcut("execution(* com.bird.service.impl.PersonServiceBean.*(..))")

这句话是方法切入点，execution为执行的意思，*代表任意返回值，然后是包名，.*意思是包下面的所有子包。(..)代

表各种方法.

然后下面的注解就比较简单了，就是在使用方法前和中，还有环绕拦截/

然后在Spring的配置文件中继续配置Bean,需要打开AOP命名空间

然后建立一个Junit测试

package junit.test;import org.junit.Test;import org.springframework.context.ApplicationContext;import org.springframework.context.support.ClassPathXmlApplicationContext;import com.bird.service.PersonServer;public class SpringAOPTest {        @Test    public void inteceptorTest(){        ApplicationContext ctx = new ClassPathXmlApplicationContext("beanAop.xml");        PersonServer bean = (PersonServer)ctx.getBean("personServiceBean");        bean.save(null);    }    }

测试结果为

2012-3-12 18:08:39 org.springframework.context.support.AbstractApplicationContext prepareRefresh信息: Refreshing org.springframework.context.support.ClassPathXmlApplicationContext@dd20f6: display name [org.springframework.context.support.ClassPathXmlApplicationContext@dd20f6]; startup date [Mon Mar 12 18:08:39 CST 2012]; root of context hierarchy2012-3-12 18:08:40 org.springframework.beans.factory.xml.XmlBeanDefinitionReader loadBeanDefinitions信息: Loading XML bean definitions from class path resource [beanAop.xml]2012-3-12 18:08:40 org.springframework.context.support.AbstractApplicationContext obtainFreshBeanFactory信息: Bean factory for application context [org.springframework.context.support.ClassPathXmlApplicationContext@dd20f6]: org.springframework.beans.factory.support.DefaultListableBeanFactory@b0bad72012-3-12 18:08:40 org.springframework.beans.factory.support.DefaultListableBeanFactory preInstantiateSingletons信息: Pre-instantiating singletons in org.springframework.beans.factory.support.DefaultListableBeanFactory@b0bad7: defining beans [org.springframework.aop.config.internalAutoProxyCreator,personServiceBean,myInterceptor]; root of factory hierarchynull前置通知进入环绕通知我是save方法后置通知退出方法最终通知